A solid question of a hollow Earth!

This question isn't as simple as it sounds!
Ok. Here goes.......

What would happen to the world as we know it if the Earth were hollow below the crust, assuming it didn't collapse inwards?

I'll give the answer a little later.
Guys, no cheatin' by getting the answers from Google or it'll spoil the fun

[edit on 21-5-2006 by mikesingh]

Are we assuming it's still the same mass with a higher density, or the same density with a different mass? This is quite important.

Yup. Assume that the crust has enough mass to make up for the hollow centre.

What ever happened to that organization that was supposed to take a trip to the hollow earth last summer? Anyone remember that website for them?

I'll take a quick guess...

There wouldn't be enough mass to create enough gravity to hold an atmosphere, so the Earth would be without atmosphere like the moon. Without the atmosphere's heat insulation effect as well as filtering protection from the sun, the Earth would be well below survivable temperatures on the dark side, and well above on the Sun-ward side.

There would be no geomagnetic field, which is created by friction in the Earth's core, so the Earth would be bombarded with lethal radiation from the Sun.

There would be no volcanism, and hence no nutrient rich soils on the Earth's surface, so there could be no plant life, even if there was an atmosphere.





[edit on 2006-5-21 by wecomeinpeace]

Are we also assuming you can still have volcanoes and plate tectonics and convection currents in lava in the earth? Or has this dissappeared?

Originally posted by wecomeinpeace
I'll take a quick guess...

There wouldn't be enough mass to create enough gravity to hold an atmosphere, so the Earth would be without atmosphere like the moon. Without the atmosphere's heat insulation effect as well as filtering protection from the sun, the Earth would be well below survivable temperatures on the dark side, and well above on the Sun-ward side.

There would be no geomagnetic field, which is created by friction in the Earth's core, so the Earth would be bombarded with lethal radiation from the Sun.

There would be no volcanism, and hence no nutrient rich soils on the Earth's surface, so there could be no plant life, even if there was an atmosphere.


[edit on 2006-5-21 by wecomeinpeace]

Nice.

Assuming the mass is the same, we can still have an atmosphere. ?
Oooh and we'd be able to into the hollow of the earth and walk on the inside. Cool.
The geomagnetic field like you say would not be present without the iron nickel core, unless the malevolent aliens inside the earth had built a special magnetic generator with a little help from the reptillians....ahem.

Volcanoes did contribute to life on earth (CO2 and nutrients for plants) and so no life maybe?

Can you provide a little hint to what sort of effect we are looking at?